<template>
  <div class="top-category">
    <div class="container">
      <!-- 渲染面包屑导航 -->
      <XtxBread>
        <XtxBreadItem to="/">首页</XtxBreadItem>
        <XtxBreadItem>{{ category.topCategory.name }}</XtxBreadItem>
      </XtxBread>
      <!-- 自己封装得轮播图 -->
      <XtxCarousel :slides="home.bannerList" autoplay style="height: 500px"></XtxCarousel>
      <!-- 所有二级分类 -->
      <div class="sub-list">
        <h3>全部分类</h3>
        <ul>
          <li v-for="item in topCategory.children" :key="item.id">
            <RouterLink :to="`/category/sub/${item.id}`">
              <img v-lazy="item.picture" />
              <p>{{ item.name }}</p>
            </RouterLink>
          </li>
        </ul>
      </div>
      <!-- 分类关联商品 -->
      <div class="ref-goods" v-for="item in category.topCategory.children">
        <div class="head">
          <h3>- {{ item.name }} -</h3>
          <p class="tag">温暖柔软，品质之选</p>
          <XtxMore />
        </div>
        <div class="body">
          <GoodsItem :goods="obj" v-for="obj in item.goods" :key="obj.id" />
        </div>
      </div>
    </div>
  </div>
</template>

<script lang="ts" setup name="TopCategory">
import useStore from '@/store'
import { storeToRefs } from 'pinia'
// import { watch } from 'vue'
import { watchEffect } from 'vue'
import { useRoute } from 'vue-router'
import GoodsItem from './components/goods-item.vue'
const { category, home } = useStore()
const route = useRoute()
//  由于路由切换，组件没有换，还是同一个分类组件，只是根据不同得id渲染不同得分类
// setup 只会执行一次，就应该监听路由得变化，路由之哟啊变了，就应该发送请求了

// 监听路由
// watch(
//   () => route.params.id,
//   val => {
//     if (!val) return
//     category.getTopCategory(route.params.id as string)
//   },
//   {
//     immediate: true,
//   }
// )
// watchEffect() 它和watch 得区别
watchEffect(() => {
  // 如果用到得数据，确实都需要依赖，依赖了就要变化 =>watchEffect
  //有参数才发请求,没有参数直接 return
  if (!route.params.id) return
  // 这个请求，只在一级目录，去发
  if (route.fullPath !== `/category/${route.params.id}`) return
  // 获取一级分类得数据（渲染面包屑等）
  category.getTopCategory(route.params.id as string)
  // 获取展示得轮播图数据
  home.getBannerList()
  // console.log(route.params.id)
})

const { topCategory } = storeToRefs(category)
</script>

<style scoped lang="less">
.top-category {
  h3 {
    font-size: 28px;
    color: #666;
    font-weight: normal;
    text-align: center;
    line-height: 100px;
  }
  .sub-list {
    margin-top: 20px;
    background-color: #fff;
    ul {
      display: flex;
      padding: 0 32px;
      flex-wrap: wrap;
      li {
        width: 168px;
        height: 160px;
        a {
          text-align: center;
          display: block;
          font-size: 16px;
          img {
            width: 100px;
            height: 100px;
          }
          p {
            line-height: 40px;
          }
          &:hover {
            color: @xtxColor;
          }
        }
      }
    }
  }
}
.ref-goods {
  background-color: #fff;
  margin-top: 20px;
  position: relative;
  .head {
    .xtx-more {
      position: absolute;
      top: 20px;
      right: 20px;
    }
    .tag {
      text-align: center;
      color: #999;
      font-size: 20px;
      position: relative;
      top: -20px;
    }
  }
  .body {
    display: flex;
    justify-content: flex-start;
    flex-wrap: wrap;
    padding: 0 65px 30px;
  }
}
</style>
